Alert archive / Pennsylvania / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Pennsylvania, 2015
407 severe thunderstorm warnings in 2015. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Severe Thunderstorm Warnings
- 407
- Busiest month
- June187 severe thunderstorm warnings
- Busiest day
- June 23, 201553 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
272 of 407 severe thunderstorm warnings covering Pennsylvania in 2015 had a qualifying storm report inside them; 635 of 781 hail, wind and damage reports fell inside a warning, on average 23 minutes after it went out.
Pennsylvania, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 407 | 272 | 33% | 781 | 81% | 23 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Cleveland, OH: severe thunderstorm warnings | 112 | 77 | 31% | 158 | 78% | 16 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 120 | 60 | 50% | 230 | 84% | 24 min |
| NWS Binghamton, NY: severe thunderstorm warnings | 62 | 40 | 35% | 108 | 81% | 23 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 174 | 133 | 24% | 505 | 84% | 19 min |
| NWS State College, PA: severe thunderstorm warnings | 174 | 111 | 36% | 302 | 78% | 27 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 4:38 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 37 min |
| Apr 9, 5:05 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 25 min |
| Apr 9, 5:17 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 28 min |
| Apr 9, 5:29 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Greene, Washington | 31 min |
| Apr 9, 5:38 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 37 min |
| Apr 9, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Greene, Washington | 34 min |
| Apr 9, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 34 min |
| Apr 9, 6:12 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 33 min |
| Apr 9, 6:17 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Fayette, Greene, Washington and 1 more | 28 min |
| Apr 9, 6:43 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Fayette, Indiana, Jefferson, Westmoreland | 32 min |
| Apr 20, 5:17 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 43 min |
| Apr 20, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 65 min |
| Apr 20, 5:28 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield, Elk | 62 min |
| Apr 20, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Centre, Huntingdon | 59 min |
| Apr 20, 7:02 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Lycoming | 58 min |
| Apr 20, 7:09 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 66 min |
| Apr 20, 7:21 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Centre, Huntingdon, Mifflin | 54 min |
| Apr 20, 7:22 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Huntingdon, Mifflin, Union | 53 min |
| Apr 20, 7:32 PM EDT | Severe Thunderstorm Warning | CTP | Fulton, Huntingdon | 58 min |
| Apr 20, 7:40 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 65 min |
| Apr 20, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 42 min |
| Apr 20, 7:56 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Fulton, Perry | 64 min |
| Apr 20, 7:59 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Perry | 61 min |
| Apr 20, 8:19 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Huntingdon, Lycoming, Mifflin, Snyder and 1 more | 56 min |
| Apr 20, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin | 60 min |
| Apr 20, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 58 min |
| Apr 20, 8:54 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Juniata, Lebanon, Northumberland, Perry and 2 more | 66 min |
| Apr 20, 9:00 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 60 min |
| Apr 20, 9:03 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 42 min |
| Apr 22, 3:09 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 51 min |
| May 6, 2:54 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton, Huntingdon | 81 min |
| May 6, 4:42 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria | 63 min |
| May 6, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 56 min |
| May 11, 7:46 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 29 min |
| May 11, 7:51 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 39 min |
| May 11, 8:01 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 59 min |
| May 11, 8:02 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 43 min |
| May 11, 8:17 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 43 min |
| May 11, 8:25 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 35 min |
| May 11, 8:34 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 41 min |
| May 11, 8:45 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Mercer, Venango | 45 min |
| May 11, 8:59 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 21 min |
| May 11, 9:26 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 49 min |
| May 11, 10:37 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield | 38 min |
| May 11, 10:59 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Lycoming, Potter, Tioga | 61 min |
| May 11, 11:06 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cameron, Centre, Clearfield, Clinton, Huntingdon and 1 more | 54 min |
| May 16, 3:27 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wyoming | 48 min |
| May 16, 3:36 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin | 39 min |
| May 16, 4:38 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 52 min |
| May 16, 5:10 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Schuylkill, Snyder | 65 min |
| May 16, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 49 min |
| May 16, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 39 min |
| May 16, 6:31 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 44 min |
| May 16, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 45 min |
| May 16, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 26 min |
| May 27, 12:29 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, York | 31 min |
| May 27, 1:42 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, York | 48 min |
| May 27, 1:50 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 55 min |
| May 27, 2:33 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 42 min |
| May 27, 2:56 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 34 min |
| May 27, 3:26 PM EDT | Severe Thunderstorm Warning | BGM | Pike, Wayne | 64 min |
| May 27, 4:36 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 39 min |
| May 27, 5:07 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery | 53 min |
| May 27, 5:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 44 min |
| May 29, 4:41 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 34 min |
| May 29, 5:02 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 28 min |
| May 29, 5:07 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 19 min |
| May 29, 5:22 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Westmoreland | 23 min |
| May 29, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 34 min |
| May 29, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 18 min |
| May 30, 7:24 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 36 min |
| May 31, 11:05 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 25 min |
| May 31, 11:30 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 30 min |
| May 31, 11:43 AM EDT | Severe Thunderstorm Warning | CTP | Elk | 47 min |
| May 31, 1:00 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 45 min |
| May 31, 1:04 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 56 min |
| May 31, 1:26 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Clarion, Venango | 34 min |
| May 31, 2:17 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Union | 55 min |
| May 31, 2:40 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 35 min |
| May 31, 3:02 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 23 min |
| May 31, 3:12 PM EDT | Severe Thunderstorm Warning | CTP | Fulton, Huntingdon | 42 min |
| May 31, 3:45 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 50 min |
| May 31, 3:56 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 49 min |
| May 31, 4:00 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 30 min |
| May 31, 4:14 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Centre, Huntingdon | 44 min |
| May 31, 4:25 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 35 min |
| May 31, 4:29 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 31 min |
| May 31, 4:33 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 42 min |
| May 31, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 63 min |
| May 31, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 37 min |
| May 31, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 27 min |
| May 31, 5:57 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 63 min |
| May 31, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster | 17 min |
| May 31, 6:18 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 87 min |
| May 31, 6:35 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 55 min |
| May 31, 7:03 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 87 min |
| May 31, 7:39 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 36 min |
| May 31, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 35 min |
| Jun 1, 2:43 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 32 min |
| Jun 1, 3:20 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 55 min |
| Jun 5, 5:49 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 26 min |
| Jun 5, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 25 min |
| Jun 8, 2:00 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Northumberland, Snyder, Union | 45 min |
| Jun 8, 2:35 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton, Lycoming, Potter, Tioga | 70 min |
| Jun 8, 2:42 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Dauphin, Juniata, Mifflin, Montour, Northumberland and 4 more | 48 min |
| Jun 8, 2:44 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Huntingdon, Somerset | 61 min |
| Jun 8, 3:42 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Mifflin, Snyder | 63 min |
| Jun 8, 3:49 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Sullivan | 71 min |
| Jun 8, 4:18 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Franklin, Lebanon, Northumberland, Perry and 1 more | 72 min |
| Jun 8, 4:29 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 46 min |
| Jun 8, 4:37 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 38 min |
| Jun 8, 4:38 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 25 min |
| Jun 8, 5:08 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lancaster, Lebanon, Schuylkill, York | 67 min |
| Jun 8, 5:12 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, York | 63 min |
| Jun 8, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 58 min |
| Jun 8, 5:51 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 54 min |
| Jun 8, 6:11 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, York | 79 min |
| Jun 8, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Northampton | 59 min |
| Jun 8, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 41 min |
| Jun 8, 7:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery | 56 min |
| Jun 11, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 26 min |
| Jun 11, 4:59 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder | 61 min |
| Jun 11, 5:14 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 31 min |
| Jun 11, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland, Schuylkill | 50 min |
| Jun 11, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 34 min |
| Jun 11, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 29 min |
| Jun 11, 5:56 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 64 min |
| Jun 11, 6:00 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 30 min |
| Jun 11, 6:12 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 48 min |
| Jun 11, 6:14 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield, Huntingdon | 61 min |
| Jun 11, 6:15 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 30 min |
| Jun 11, 6:18 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 62 min |
| Jun 11, 6:55 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 12 min |
| Jun 11, 7:13 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Mifflin, Snyder, Union | 62 min |
| Jun 11, 7:35 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Northumberland, Schuylkill, Snyder, Union | 70 min |
| Jun 11, 8:07 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Schuylkill | 53 min |
| Jun 12, 3:28 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 47 min |
| Jun 12, 4:10 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 47 min |
| Jun 12, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Northumberland, Schuylkill, Snyder | 45 min |
| Jun 12, 4:28 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 92 min |
| Jun 12, 4:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 48 min |
| Jun 12, 4:59 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 31 min |
| Jun 12, 5:07 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 38 min |
| Jun 12, 5:22 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 23 min |
| Jun 12, 5:30 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence, Washington | 30 min |
| Jun 12, 5:35 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 25 min |
| Jun 12, 5:36 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Elk, McKean, Potter | 69 min |
| Jun 12, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 49 min |
| Jun 12, 5:45 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Forest, Venango | 30 min |
| Jun 12, 5:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Indiana and 3 more | 47 min |
| Jun 12, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 28 min |
| Jun 12, 6:15 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Forest, Jefferson | 45 min |
| Jun 12, 6:32 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Cameron, Centre, Clearfield, Clinton and 1 more | 73 min |
| Jun 12, 6:40 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton, Lycoming, Potter, Tioga | 80 min |
| Jun 12, 6:45 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Indiana, Jefferson | 30 min |
| Jun 12, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 52 min |
| Jun 12, 7:02 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Huntingdon | 73 min |
| Jun 12, 7:23 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 52 min |
| Jun 12, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 33 min |
| Jun 12, 7:36 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 39 min |
| Jun 12, 7:41 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 64 min |
| Jun 12, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Centre, Clearfield, Clinton, Huntingdon, Juniata and 4 more | 63 min |
| Jun 12, 7:42 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 33 min |
| Jun 12, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Huntingdon, Somerset | 53 min |
| Jun 12, 8:01 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 59 min |
| Jun 12, 8:01 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Sullivan, Tioga | 59 min |
| Jun 12, 8:14 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Juniata, Mifflin, Perry | 61 min |
| Jun 12, 8:19 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 56 min |
| Jun 12, 8:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Columbia, Juniata, Lycoming, Mifflin and 4 more | 77 min |
| Jun 12, 9:18 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lancaster, Lebanon, Northumberland, Perry and 2 more | 57 min |
| Jun 14, 3:30 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 45 min |
| Jun 14, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 38 min |
| Jun 14, 5:40 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 50 min |
| Jun 14, 6:11 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Schuylkill | 49 min |
| Jun 14, 6:17 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 28 min |
| Jun 14, 6:21 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 54 min |
| Jun 14, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 55 min |
| Jun 14, 6:41 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 79 min |
| Jun 14, 7:11 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 49 min |
| Jun 14, 7:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 44 min |
| Jun 14, 8:11 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 49 min |
| Jun 14, 8:59 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 46 min |
| Jun 14, 9:28 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 47 min |
| Jun 14, 9:33 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 27 min |
| Jun 14, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 48 min |
| Jun 14, 9:56 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 34 min |
| Jun 14, 10:18 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 72 min |
| Jun 14, 10:49 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 39 min |
| Jun 15, 12:33 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 27 min |
| Jun 18, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 29 min |
| Jun 18, 7:40 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 36 min |
| Jun 18, 8:10 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence, Washington | 50 min |
| Jun 18, 8:49 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Washington, Westmoreland | 56 min |
| Jun 18, 9:21 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 54 min |
| Jun 18, 9:24 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 39 min |
| Jun 18, 9:35 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 40 min |
| Jun 20, 3:28 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 47 min |
| Jun 20, 4:11 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 49 min |
| Jun 20, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Greene, Washington, Westmoreland | 62 min |
| Jun 20, 4:16 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 74 min |
| Jun 20, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 48 min |
| Jun 20, 5:16 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 74 min |
| Jun 20, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield | 56 min |
| Jun 20, 7:46 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 59 min |
| Jun 20, 7:47 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin | 43 min |
| Jun 20, 8:00 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland | 60 min |
| Jun 20, 8:34 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 56 min |
| Jun 20, 9:17 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, York | 43 min |
| Jun 20, 10:07 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 38 min |
| Jun 21, 4:55 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 35 min |
| Jun 23, 4:05 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 55 min |
| Jun 23, 5:50 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton, Elk, McKean, Potter, Warren | 55 min |
| Jun 23, 6:18 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Elk | 57 min |
| Jun 23, 6:36 AM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter, Tioga | 54 min |
| Jun 23, 7:14 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield, Clinton, Lycoming, Tioga, Union | 76 min |
| Jun 23, 7:53 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 22 min |
| Jun 23, 8:02 AM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 58 min |
| Jun 23, 8:48 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield, Huntingdon | 57 min |
| Jun 23, 9:13 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin | 34 min |
| Jun 23, 9:37 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Columbia, Mifflin, Montour, Northumberland and 2 more | 53 min |
| Jun 23, 9:57 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 37 min |
| Jun 23, 10:24 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 39 min |
| Jun 23, 10:25 AM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 10 min |
| Jun 23, 11:24 AM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 66 min |
| Jun 23, 11:32 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 28 min |
| Jun 23, 11:50 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 55 min |
| Jun 23, 12:23 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Mifflin, Snyder, Union | 37 min |
| Jun 23, 12:36 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 24 min |
| Jun 23, 12:50 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Mifflin, Montour, Northumberland, Snyder and 1 more | 55 min |
| Jun 23, 12:57 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 48 min |
| Jun 23, 1:30 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 30 min |
| Jun 23, 1:32 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 43 min |
| Jun 23, 1:35 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 25 min |
| Jun 23, 1:36 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 39 min |
| Jun 23, 1:37 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Northumberland, Perry, Schuylkill, Snyder | 38 min |
| Jun 23, 1:37 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Westmoreland | 38 min |
| Jun 23, 1:41 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 49 min |
| Jun 23, 1:51 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Westmoreland | 24 min |
| Jun 23, 1:55 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 54 min |
| Jun 23, 1:56 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 19 min |
| Jun 23, 2:13 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 17 min |
| Jun 23, 2:15 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 30 min |
| Jun 23, 2:19 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 41 min |
| Jun 23, 2:29 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 46 min |
| Jun 23, 2:43 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 17 min |
| Jun 23, 2:47 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 13 min |
| Jun 23, 2:53 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 52 min |
| Jun 23, 2:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Indiana, Westmoreland | 39 min |
| Jun 23, 3:03 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 42 min |
| Jun 23, 3:08 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Fulton, Huntingdon, Perry | 67 min |
| Jun 23, 3:16 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 29 min |
| Jun 23, 3:19 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 56 min |
| Jun 23, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lancaster, Lebanon, Perry, York | 65 min |
| Jun 23, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 64 min |
| Jun 23, 4:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 24 min |
| Jun 23, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 31 min |
| Jun 23, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Franklin, York | 60 min |
| Jun 23, 4:44 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 61 min |
| Jun 23, 4:49 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin, York | 56 min |
| Jun 23, 4:54 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 48 min |
| Jun 23, 5:05 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 40 min |
| Jun 23, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 47 min |
| Jun 23, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 52 min |
| Jun 27, 5:49 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 26 min |
| Jun 30, 1:06 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 54 min |
| Jun 30, 1:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 52 min |
| Jun 30, 1:54 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 66 min |
| Jun 30, 2:05 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 55 min |
| Jun 30, 2:34 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 56 min |
| Jun 30, 2:41 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 49 min |
| Jun 30, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 38 min |
| Jun 30, 3:00 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 60 min |
| Jun 30, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin, Snyder, Union | 53 min |
| Jun 30, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 37 min |
| Jun 30, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 47 min |
| Jun 30, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 45 min |
| Jun 30, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 43 min |
| Jun 30, 4:05 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 55 min |
| Jun 30, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 66 min |
| Jun 30, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 77 min |
| Jun 30, 5:27 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 33 min |
| Jun 30, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler, Westmoreland | 34 min |
| Jun 30, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 47 min |
| Jun 30, 6:30 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 30 min |
| Jun 30, 7:13 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 62 min |
| Jun 30, 8:14 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 61 min |
| Jun 30, 8:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 28 min |
| Jun 30, 9:00 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Northumberland, Snyder, Union | 60 min |
| Jun 30, 9:04 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Union | 86 min |
| Jun 30, 9:45 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Sullivan | 60 min |
| Jun 30, 10:36 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wyoming | 54 min |
| Jun 30, 11:08 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 52 min |
| Jul 1, 1:42 AM EDT | Severe Thunderstorm Warning | PHI | Chester | 48 min |
| Jul 1, 2:17 AM EDT | Severe Thunderstorm Warning | PHI | Delaware | 43 min |
| Jul 7, 4:23 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest | 37 min |
| Jul 7, 4:36 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 39 min |
| Jul 7, 5:15 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 45 min |
| Jul 7, 5:41 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 34 min |
| Jul 7, 6:15 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 45 min |
| Jul 7, 6:50 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 55 min |
| Jul 7, 6:59 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Greene, Washington | 31 min |
| Jul 7, 7:05 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 25 min |
| Jul 7, 7:27 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Washington | 33 min |
| Jul 7, 7:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler | 32 min |
| Jul 7, 8:04 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Fayette, Indiana, Westmoreland | 26 min |
| Jul 7, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 43 min |
| Jul 7, 8:58 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Forest, Jefferson | 47 min |
| Jul 7, 9:02 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 28 min |
| Jul 7, 9:19 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Elk | 56 min |
| Jul 7, 9:26 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre | 49 min |
| Jul 9, 1:12 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 33 min |
| Jul 9, 1:44 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington, Westmoreland | 46 min |
| Jul 9, 2:05 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 70 min |
| Jul 9, 2:05 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 40 min |
| Jul 9, 2:21 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 54 min |
| Jul 9, 2:28 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 32 min |
| Jul 9, 2:30 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 45 min |
| Jul 9, 2:43 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 47 min |
| Jul 9, 3:12 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 63 min |
| Jul 9, 3:29 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Indiana, Jefferson | 46 min |
| Jul 9, 4:50 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin | 55 min |
| Jul 9, 5:07 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, York | 98 min |
| Jul 9, 5:20 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan, Union | 29 min |
| Jul 9, 5:34 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, York | 86 min |
| Jul 9, 6:01 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 74 min |
| Jul 9, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 45 min |
| Jul 9, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 40 min |
| Jul 9, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 40 min |
| Jul 9, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 48 min |
| Jul 9, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Northampton | 48 min |
| Jul 9, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 46 min |
| Jul 9, 7:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 66 min |
| Jul 9, 7:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 40 min |
| Jul 14, 3:32 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 43 min |
| Jul 14, 3:37 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean | 68 min |
| Jul 14, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 55 min |
| Jul 14, 4:48 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Centre, Huntingdon | 72 min |
| Jul 14, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 65 min |
| Jul 14, 5:30 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Potter, Tioga | 90 min |
| Jul 15, 3:39 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 66 min |
| Jul 18, 7:21 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder | 39 min |
| Jul 18, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 43 min |
| Jul 19, 5:50 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 40 min |
| Jul 19, 6:15 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 60 min |
| Jul 19, 6:38 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 47 min |
| Jul 19, 7:02 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 28 min |
| Jul 19, 7:35 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean | 30 min |
| Jul 19, 7:53 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 27 min |
| Jul 19, 8:02 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean | 41 min |
| Jul 19, 8:09 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Potter | 34 min |
| Jul 19, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Clinton, Elk, Potter | 60 min |
| Jul 19, 9:00 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 60 min |
| Jul 26, 4:33 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Mercer, Venango | 27 min |
| Jul 27, 12:02 AM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, York | 73 min |
| Aug 3, 4:19 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 41 min |
| Aug 3, 4:22 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 53 min |
| Aug 3, 4:57 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 48 min |
| Aug 3, 5:24 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 51 min |
| Aug 3, 5:43 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 47 min |
| Aug 3, 6:08 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 52 min |
| Aug 3, 6:29 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Westmoreland | 46 min |
| Aug 3, 6:52 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington | 38 min |
| Aug 3, 6:57 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 78 min |
| Aug 3, 7:07 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 38 min |
| Aug 3, 7:11 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Jefferson | 34 min |
| Aug 3, 7:16 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean | 74 min |
| Aug 3, 7:42 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 48 min |
| Aug 3, 7:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 50 min |
| Aug 3, 8:21 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 39 min |
| Aug 3, 8:57 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 33 min |
| Aug 3, 9:05 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 40 min |
| Aug 3, 9:22 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 38 min |
| Aug 3, 9:38 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 52 min |
| Aug 3, 11:34 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Mifflin | 70 min |
| Aug 3, 11:39 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 29 min |
| Aug 3, 11:52 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 38 min |
| Aug 4, 12:13 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 47 min |
| Aug 4, 12:25 AM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 53 min |
| Aug 4, 12:46 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 17 min |
| Aug 4, 1:31 AM EDT | Severe Thunderstorm Warning | PHI | Berks | 44 min |
| Aug 4, 1:54 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 50 min |
| Aug 4, 2:52 AM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 83 min |
| Aug 4, 3:59 AM EDT | Severe Thunderstorm Warning | BGM | Bradford | 31 min |
| Aug 4, 4:20 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 33 min |
| Aug 15, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 30 min |
| Aug 20, 1:33 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Lancaster, York | 57 min |
| Aug 20, 5:19 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Perry, Snyder | 56 min |
| Aug 24, 4:50 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 40 min |
| Sep 3, 3:48 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 42 min |
| Sep 3, 3:57 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 48 min |
| Sep 4, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 14 min |
| Sep 4, 8:37 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 38 min |
| Sep 4, 9:12 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 26 min |
| Sep 9, 4:52 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Westmoreland | 38 min |
| Sep 30, 1:20 AM EDT | Severe Thunderstorm Warning | PHI | Berks | 55 min |
| Sep 30, 1:22 AM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, Schuylkill | 68 min |
| Oct 9, 2:36 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Perry, York | 39 min |
| Oct 9, 2:50 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Northumberland, Perry, Schuylkill | 55 min |
| Oct 9, 3:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 58 min |
| Oct 9, 3:37 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 53 min |
| Oct 9, 3:50 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 55 min |
| Oct 9, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 44 min |
| Oct 9, 4:08 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 52 min |
| Oct 9, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 51 min |
| Oct 28, 8:54 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, York | 81 min |
| Oct 28, 9:11 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 64 min |
| Nov 10, 2:07 PM EST | Severe Thunderstorm Warning | PHI | Bucks | 23 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County43
- Washington County38
- Butler County37
- Westmoreland County34
- Chester County32
- Beaver County31
- York County30
- Armstrong County29
- Berks County28
- Centre County26
- Dauphin County26
- Fayette County25
- Lancaster County25
- Lebanon County24
- Northumberland County24
- Lawrence County23
- Snyder County22
- Schuylkill County22
- Huntingdon County21
- Clarion County21
- Clinton County20
- Montgomery County20
- Indiana County19
- Clearfield County19
- Lycoming County19
- Greene County18
- Cumberland County18
- Northampton County18
- Mifflin County17
- Union County17
- Adams County17
- Columbia County17
- Jefferson County16
- Cambria County16
- Lehigh County16
- Delaware County16
- Blair County15
- Bucks County15
- Venango County14
- Elk County14
27 more counties
- Perry County14
- Franklin County13
- Juniata County13
- Cameron County13
- Forest County12
- Potter County11
- Erie County11
- Montour County11
- Monroe County11
- McKean County11
- Mercer County10
- Tioga County10
- Philadelphia County10
- Somerset County10
- Bedford County9
- Crawford County9
- Warren County8
- Fulton County7
- Sullivan County5
- Luzerne County5
- Carbon County4
- Wyoming County3
- Susquehanna County3
- Bradford County3
- Lackawanna County2
- Pike County2
- Wayne County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20142016
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.